The invention discloses a tooling platform used for mounting a full-monocoque new energy bus roof-top air conditioner. The tooling platform comprises a supporting pillar, a left platform frame and a right platform frame both arranged on the supporting pillar, as well as a crawling ladder of which the top end is connected with the left platform frame or the right platform frame, a crossing bridge assembly connected between the left platform frame and the right platform frame, and a movable operation platform arranged between the left platform frame and the right platform frame. According to the invention, when the air conditioner is mounted, operators can stand on the movable operation platform for performing related operations, so that the problems that the conventional full-monocoque new energy bus roof-top air conditioner is difficult to mount and the bus roof is easy to damage due to mounting are solved.